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79fa9765ca
We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace! This was a slightly tedious refactoring that took a long time, so it's not unlikely that some bugs crept in. Nevertheless, it does pass basic functionality testing, and it's just real nice to finally see the same pattern in all contexts. :^)
83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Debug.h>
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#include <Kernel/Devices/DeviceManagement.h>
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#include <Kernel/FileSystem/OpenFileDescription.h>
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#include <Kernel/Storage/Partition/DiskPartition.h>
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namespace Kernel {
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NonnullRefPtr<DiskPartition> DiskPartition::create(BlockDevice& device, unsigned minor_number, DiskPartitionMetadata metadata)
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{
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auto partition_or_error = DeviceManagement::try_create_device<DiskPartition>(device, minor_number, metadata);
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// FIXME: Find a way to propagate errors
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VERIFY(!partition_or_error.is_error());
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return partition_or_error.release_value();
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}
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DiskPartition::DiskPartition(BlockDevice& device, unsigned minor_number, DiskPartitionMetadata metadata)
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: BlockDevice(100, minor_number, device.block_size())
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, m_device(device)
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, m_metadata(metadata)
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{
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}
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DiskPartition::~DiskPartition()
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{
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}
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const DiskPartitionMetadata& DiskPartition::metadata() const
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{
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return m_metadata;
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}
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void DiskPartition::start_request(AsyncBlockDeviceRequest& request)
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{
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auto device = m_device.strong_ref();
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if (!device)
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request.complete(AsyncBlockDeviceRequest::RequestResult::Failure);
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auto sub_request_or_error = device->try_make_request<AsyncBlockDeviceRequest>(request.request_type(),
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request.block_index() + m_metadata.start_block(), request.block_count(), request.buffer(), request.buffer_size());
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if (sub_request_or_error.is_error())
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TODO();
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request.add_sub_request(sub_request_or_error.release_value());
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}
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ErrorOr<size_t> DiskPartition::read(OpenFileDescription& fd, u64 offset, UserOrKernelBuffer& outbuf, size_t len)
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{
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unsigned adjust = m_metadata.start_block() * block_size();
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dbgln_if(OFFD_DEBUG, "DiskPartition::read offset={}, adjust={}, len={}", fd.offset(), adjust, len);
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return m_device.strong_ref()->read(fd, offset + adjust, outbuf, len);
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}
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bool DiskPartition::can_read(const OpenFileDescription& fd, size_t offset) const
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{
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unsigned adjust = m_metadata.start_block() * block_size();
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dbgln_if(OFFD_DEBUG, "DiskPartition::can_read offset={}, adjust={}", offset, adjust);
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return m_device.strong_ref()->can_read(fd, offset + adjust);
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}
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ErrorOr<size_t> DiskPartition::write(OpenFileDescription& fd, u64 offset, const UserOrKernelBuffer& inbuf, size_t len)
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{
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unsigned adjust = m_metadata.start_block() * block_size();
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dbgln_if(OFFD_DEBUG, "DiskPartition::write offset={}, adjust={}, len={}", offset, adjust, len);
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return m_device.strong_ref()->write(fd, offset + adjust, inbuf, len);
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}
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bool DiskPartition::can_write(const OpenFileDescription& fd, size_t offset) const
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{
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unsigned adjust = m_metadata.start_block() * block_size();
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dbgln_if(OFFD_DEBUG, "DiskPartition::can_write offset={}, adjust={}", offset, adjust);
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return m_device.strong_ref()->can_write(fd, offset + adjust);
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}
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StringView DiskPartition::class_name() const
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{
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return "DiskPartition"sv;
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}
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}
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